CN110887637A - Coaxial collimator optical axis leading-out device and method - Google Patents
Coaxial collimator optical axis leading-out device and method Download PDFInfo
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- CN110887637A CN110887637A CN201911093507.5A CN201911093507A CN110887637A CN 110887637 A CN110887637 A CN 110887637A CN 201911093507 A CN201911093507 A CN 201911093507A CN 110887637 A CN110887637 A CN 110887637A
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- collimator
- laser
- optical axis
- plane mirror
- standard plane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0271—Testing optical properties by measuring geometrical properties or aberrations by using interferometric methods
Abstract
The invention discloses a coaxial collimator optical axis leading-out device and method. The collimator optical axis leading-out device comprises a laser interferometer, a standard plane mirror and a laser collimator, wherein the laser collimator can emit collimated laser beams, is fixed on the collimator mounting surface and realizes two-dimensional adjustability. The collimator optical axis leading-out method comprises the following steps: determining the central view field of the collimator, namely the direction of an optical axis, by using a laser interferometer and a standard plane mirror; adjusting the posture of the laser collimator to enable the laser collimator to auto-collimate the standard plane mirror; the beam direction of the laser collimator is the optical axis direction of the collimator, and the installation and adjustment are completed. The invention leads out the optical axes of the coaxial collimator tubes in parallel without any component, and is beneficial to efficiently utilizing the collimator tubes to test products.
Description
Technical Field
The invention belongs to the technical field of optical assembly, calibration and detection, and particularly relates to a coaxial collimator optical axis leading-out device and method.
Background
The collimator is one of important tools for assembling, correcting and detecting an optical instrument, an infinite collimation target is provided in the general adjusting process of a camera, the collimator is matched with a light source and a target device for use, space targets with different characteristics can be simulated, the camera, the collimator and the target are spatially separated, the optical axis of the collimator is aligned with the visual axis of the camera before each test, and the target is adjusted to the focal plane position of the collimator and the center of the target is positioned in the central view field of the collimator, so that the optical axis of the collimator needs to be calibrated. The prior art of collimator alignment is mainly an indirect extraction method of the optical axis.
The indirect leading-out method is that the theodolite is used to lead out the optical axis of the camera to a reference cubic mirror, and the optical axis of the collimator is led out to another reference cubic mirror. The relationship of the two reference cube mirrors is established by measuring the angles of the two reference cube mirrors to align the collimator optical axis with the camera optical axis. In the prior art, the optical axis alignment time is long, multiple times of collimation and mutual aiming measurement need to be carried out by means of a theodolite of a measuring instrument, and auto-collimation measurement errors and mutual aiming measurement errors are introduced.
Disclosure of Invention
The invention provides a coaxial collimator optical axis leading-out device and method, aiming at solving the problem of longer alignment time of the coaxial collimator optical axis.
A coaxial collimator optical axis leading-out device comprises a laser interferometer, a laser collimator and a standard plane mirror, wherein the laser collimator consists of a laser emission source, a two-dimensional adjusting mechanism and a round hole target plate; the method is characterized in that: the laser interferometer is arranged on one side of the focal plane of the collimator, the standard plane mirror is arranged in front of the light outlet of the collimator and used for calibrating the optical axis of the collimator, and the laser collimator is fixed at the center of the light outlet of the collimator.
The standard plane mirror has surface shape accuracy RMS better than 1/10 lambda (lambda is 632.8nm), and has pitch and yaw direction adjusting functions.
The laser collimator can emit collimated laser beams, laser of the laser collimator is a visible light source, the laser collimator is fixed on the two-dimensional adjusting mechanism, and the other end of the two-dimensional adjusting mechanism is fixedly connected with the end face of the collimator. By adjusting the direction of the emitted laser beam, the returned laser spot falls into the round hole of the receiving round hole target plate.
The method for leading out the optical axis of the collimator comprises the following steps:
and adjusting the position of the laser interferometer to enable the focal point of the laser interferometer to coincide with the center of the focal plane of the collimator, wherein the light spot of the laser interferometer is positioned at the center of the outlet of the collimator. After adjustment, the optical axis of the laser interferometer coincides with the optical axis of the collimator.
And adjusting the posture of the standard plane mirror to enable the full-aperture interference fringes to be in zero-order fringes. After adjustment, the normal direction of the standard plane mirror coincides with the optical axis of the collimator.
The posture of the laser collimator is adjusted, and the angle change of the pitching and yawing directions is realized by adjusting the two-dimensional adjusting mechanism. After adjustment, laser emitted by the laser collimator is reflected into the round hole of the receiving round hole target plate through the standard plane mirror, and the beam direction of the laser collimator is the optical axis direction of the collimator.
The invention leads out the optical axis of the collimator in parallel without any component, and is beneficial to efficiently utilizing the collimator to test products.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the optical axis of the collimator is led out in parallel without any component, so that errors caused by indirect measurement by a theodolite are avoided;
(2) the optical axis of the collimator can be quickly aligned;
(3) the operation is simple, and a large amount of calculation for establishing the connection by using the reference cube mirror is omitted.
Drawings
FIG. 1 is a schematic view of an optical axis extracting device of a collimator according to the present invention.
In the figure: 1 is a laser interferometer, 2 is a laser collimator, 2-1 is a laser emission source, 2-3 is a two-dimensional adjusting mechanism, and 3 is a standard plane mirror.
Detailed Description
A collimator optical axis leading-out device comprises a laser interferometer, a laser collimator and a standard plane mirror, wherein the laser collimator consists of a laser collimation emission source, a two-dimensional adjusting mechanism and a round hole target plate; the method is characterized in that: the laser interferometer is arranged on one side of the focal plane of the collimator, the standard plane mirror is arranged in front of the light outlet of the collimator and used for calibrating the optical axis of the collimator, and the laser collimator is fixed on the mounting surface on the back of the secondary mirror of the collimator, namely the center position of the outlet of the collimator.
The technical solution of the present invention is further explained with reference to the drawings, but the present invention is not limited thereto.
A method for leading out an optical axis of a collimator comprises the following steps:
step a: and adjusting the position of the laser interferometer 1 to enable the focal point of the laser interferometer 1 to coincide with the center of the focal plane of the collimator, wherein the light spot of the laser interferometer 1 is positioned at the center of the outlet of the collimator. After adjustment, the optical axis of the laser interferometer coincides with the optical axis of the collimator.
Step b: and adjusting the posture of the standard plane mirror 3 to enable the full-aperture interference fringe to be in a zero-order fringe. After adjustment, the normal direction of the standard plane mirror 3 is superposed with the optical axis of the collimator.
Step c: the posture of the laser collimator 2 is adjusted, and the angle change in the pitching and yawing directions is realized by adjusting 3 screw rods of the two-dimensional adjusting mechanism. After adjustment, laser emitted by the laser collimator 2 is reflected by the standard plane mirror 3 and returns back along a strict original path, and the beam direction of the laser collimator 2 is the optical axis direction of the collimator.
The invention is implemented according to the technical scheme steps for solving the technical problem. The surface shape accuracy RMS of the standard plane mirror is better than 1/10 lambda, and the standard plane mirror has the function of two-dimensional adjustment of pitching and yawing directions.
During actual assembly and calibration, the central view field, namely the optical axis direction, of the collimator is determined by using the laser interferometer 1 and the standard plane mirror 3, and the relative positions of the interferometer 1 and the standard plane mirror 3 are adjusted, so that the optical axis of the laser interferometer 1 is coincided with the optical axis of the collimator. After adjustment, the full-aperture interference fringes are in zero-order fringes, and the defocusing amount of the laser interferometer is close to zero; the position of the standard plane mirror 3 is fixed, the laser collimator 2 is calibrated, and the laser collimator 2 and the standard plane mirror are self-collimated.
The laser collimator 2 is a semiconductor laser diode, and a collimating lens is arranged at the front end of the laser collimator and used for improving the collimation degree and improving the quality and working distance of laser beams. The laser collimator 2 can emit visible laser and can realize two-dimensional adjustment of pitching and yawing directions, the laser collimator is fixed on the two-dimensional adjusting mechanism, and the other end of the two-dimensional adjusting mechanism is fixedly connected with the end face of the collimator.
A round hole target plate is installed at the light outlet of the laser collimator 2, the collimated laser beam emitted by the laser collimator 2 is reflected back through a standard plane mirror, the pitching and the deflection of the laser collimator are adjusted, the returned light spot falls into a round hole of the receiving target plate, and the installation and calibration are completed.
The optical axis of one collimator tube only needs to be calibrated once, and the laser interferometer 1 and the standard plane mirror 3 are not needed any more after the optical axis calibration is finished.
If the distance between the laser collimator and the entrance pupil surface of the measured product is 2000mm and the beam divergence angle of the laser collimator is 10urad, the offset of the laser beam emitted by the laser collimator on the measured product is about 0.01mm, and the offset can be ignored for guiding the placement posture of the measured product by the optical axis of the collimator led out by the laser collimator.
During testing, the laser collimator is opened, the posture of a test product is adjusted according to the direction and the position of a laser beam, after the adjustment is completed, a light source required for testing is placed at the focal plane of the collimator, an imaging pattern can be found in the field of view of a detector of the test product, and the optical axis of the collimator can be aligned with the visual axis of the camera by finely adjusting the test product according to the position of the imaging pattern.
Claims (7)
1. A coaxial collimator optical axis leading-out device comprises a laser interferometer (1), a laser collimator (2) and a standard plane mirror (3), wherein the laser collimator (2) consists of a laser collimation emission source (2-1), a two-dimensional adjusting mechanism (2-2) and a round hole target plate (2-3); the method is characterized in that:
the laser interferometer (1) is placed on one side of a focal plane of the collimator, the standard plane mirror (3) is placed in front of a light outlet of the collimator, the laser collimator (2) is fixed on a mounting surface on the back of the secondary mirror of the collimator, and a returned laser spot falls into a round hole of the receiving round hole target plate (2-3) by adjusting the direction of a transmitted laser beam.
2. The collimator optical axis extracting device as claimed in claim 1, wherein: the working wavelength of the laser interferometer (1) is a visible light wave band.
3. The collimator optical axis extracting device as claimed in claim 1, wherein: the standard plane mirror (3) has surface shape accuracy RMS better than 1/10 lambda, wherein lambda is 632.8 nm.
4. The collimator optical axis extracting device as claimed in claim 1, wherein: the standard plane mirror (3) has the functions of adjusting pitching and yawing directions.
5. The collimator optical axis extracting device as claimed in claim 1, wherein: the working wavelength of the laser collimator (2) is a visible light wave band and can emit collimated laser beams; the beam divergence angle of the laser collimator is better than 10 urad.
6. The collimator optical axis extracting device as claimed in claim 1, wherein: the laser collimator is two-dimensionally adjustable in pitching and yawing directions.
7. An optical axis extracting method based on the collimator optical axis extracting device of claim 1, characterized by comprising the following steps:
1) and adjusting the position of the laser interferometer (1) to enable the focal point of the laser interferometer to coincide with the center of the focal plane of the collimator, wherein the light spot of the laser interferometer is positioned at the center of the outlet of the collimator. After adjustment, the optical axis of the laser interferometer is superposed with the optical axis of the collimator;
2) and adjusting the posture of the standard plane mirror (3) to enable the full-aperture interference fringe to be in a zero-order fringe. After adjustment, the normal direction of the standard plane mirror is superposed with the optical axis of the collimator;
3) the posture of the laser collimator (2) is adjusted, and the angle change of the pitching and yawing directions is realized by adjusting the two-dimensional adjusting mechanism (2-2); after adjustment, laser emitted by the laser collimator is reflected by the standard plane mirror and falls into the round hole of the receiving round hole target plate (2-3), and the beam direction of the laser collimator (2) is the optical axis direction of the collimator.
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| CN201911093507.5A CN110887637A (en) | 2019-11-11 | 2019-11-11 | Coaxial collimator optical axis leading-out device and method |
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| CN201911093507.5A CN110887637A (en) | 2019-11-11 | 2019-11-11 | Coaxial collimator optical axis leading-out device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982467A (en) * | 2020-07-17 | 2020-11-24 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN112284255A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Stress-free assembly and adjustment auxiliary tool and assembly and adjustment method for reflector of photoelectric product |
| CN114252242A (en) * | 2021-11-23 | 2022-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | Optical axis calibration tool and method for telescopic system and optical system comprising front telescope |
| CN116519136A (en) * | 2023-07-03 | 2023-08-01 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
| CN117590361A (en) * | 2024-01-18 | 2024-02-23 | 深圳北醒科技有限公司 | Optical axis center testing method |
| CN117590361B (en) * | 2024-01-18 | 2024-04-30 | 深圳北醒科技有限公司 | Optical axis center testing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078615A (en) * | 2007-06-22 | 2007-11-28 | 哈尔滨工业大学 | Precision determination method for angle between optical axis and mechanical axis of optical system |
| CN102853992A (en) * | 2012-08-29 | 2013-01-02 | 中国科学院长春光学精密机械与物理研究所 | Method for improving installation accuracy of collimator tube reticle |
| CN103149013A (en) * | 2013-01-30 | 2013-06-12 | 中国科学院长春光学精密机械与物理研究所 | Collimator tube reticle high-precision adjusting method based on plane interference principle |
| CN104535300A (en) * | 2014-12-20 | 2015-04-22 | 中国科学院西安光学精密机械研究所 | Large-diameter parallel light pipe wavefront and image surface position calibration device and method |
| CN104950420A (en) * | 2015-06-25 | 2015-09-30 | 中国科学院西安光学精密机械研究所 | System and method for calibrating optical axis of non-spherical reflecting mirror |
| CN105137415A (en) * | 2015-05-25 | 2015-12-09 | 北京空间机电研究所 | Device and method for laser rangefinder receiving field-of-view calibration and optical axis parallelism measurement |
-
2019
- 2019-11-11 CN CN201911093507.5A patent/CN110887637A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078615A (en) * | 2007-06-22 | 2007-11-28 | 哈尔滨工业大学 | Precision determination method for angle between optical axis and mechanical axis of optical system |
| CN102853992A (en) * | 2012-08-29 | 2013-01-02 | 中国科学院长春光学精密机械与物理研究所 | Method for improving installation accuracy of collimator tube reticle |
| CN103149013A (en) * | 2013-01-30 | 2013-06-12 | 中国科学院长春光学精密机械与物理研究所 | Collimator tube reticle high-precision adjusting method based on plane interference principle |
| CN104535300A (en) * | 2014-12-20 | 2015-04-22 | 中国科学院西安光学精密机械研究所 | Large-diameter parallel light pipe wavefront and image surface position calibration device and method |
| CN105137415A (en) * | 2015-05-25 | 2015-12-09 | 北京空间机电研究所 | Device and method for laser rangefinder receiving field-of-view calibration and optical axis parallelism measurement |
| CN104950420A (en) * | 2015-06-25 | 2015-09-30 | 中国科学院西安光学精密机械研究所 | System and method for calibrating optical axis of non-spherical reflecting mirror |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982467A (en) * | 2020-07-17 | 2020-11-24 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN111982467B (en) * | 2020-07-17 | 2021-07-27 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN112284255A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Stress-free assembly and adjustment auxiliary tool and assembly and adjustment method for reflector of photoelectric product |
| CN114252242A (en) * | 2021-11-23 | 2022-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | Optical axis calibration tool and method for telescopic system and optical system comprising front telescope |
| CN116519136A (en) * | 2023-07-03 | 2023-08-01 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
| CN116519136B (en) * | 2023-07-03 | 2023-09-08 | 中国科学院合肥物质科学研究院 | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument |
| CN117590361A (en) * | 2024-01-18 | 2024-02-23 | 深圳北醒科技有限公司 | Optical axis center testing method |
| CN117590361B (en) * | 2024-01-18 | 2024-04-30 | 深圳北醒科技有限公司 | Optical axis center testing method |
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Application publication date: 20200317 |